Manual actuation of PTO-based chuck

Abstract

In a power driver having a chuck coupled to a drive train, an arrangement (to manually impart rotation to the drive train) includes: a housing; and a coupling mounted at least partially in the housing and connected to the drive train, the coupling being accessible though the housing, and the coupling being manually actuatable to apply a torque upon the drive train.

1 . A power driver comprising: 
 a housing;    an armature shaft mounted in the housing;    a chuck mounted on the housing and coupled to a first end of the armature shaft; and    a coupling mounted to a second end of the armature shaft, the coupling being accessible through the housing.    
   
   
       2 . The power driver of  claim 1 , wherein the coupling cooperates with an external tool to apply a torque to the armature shaft.  
   
   
       3 . The power driver of  claim 1 , wherein the chuck is a power take off (PTO) actuated type of chuck.  
   
   
       4 . In a power driver having a chuck coupled to a drive train, an arrangement to manually impart rotation to the drive train, the arrangement comprising: 
 a housing; and    a coupling mounted at least partially in the housing and connected to the drive train, the coupling being accessible though the housing, and 
 the coupling being manually actuatable to apply a torque upon the drive train.  
   
   
   
       5 . The arrangement of  claim 4 , wherein the coupling includes: 
 first and second components having respective cooperating features to achieve a rotational connection; and    a spring mounted on the first component to bias the first component to be disengaged from the second component.    
   
   
       6 . The arrangement of  claim 4 , wherein the coupling includes: 
 a spur gear on the drive train;    an axle mounted on the housing parallel to the drive train;    a socket, 
 a first end of which is mounted for rotation on the axle, a circumferential surface of the first end having gearing that meshes with the spur gear, and  
 and a second end of which cooperates with an external tool to apply a torque to the drive train.  
   
   
   
       7 . The arrangement of  claim 6 , wherein the coupling further includes: 
 a spring to bias the gearing on the first end of the socket to be disengaged from the spur gear.    
   
   
       8 . The arrangement of  claim 4 , wherein the coupling includes: 
 a component of the drive train having helical gearing;    a worm mounted on the housing orthogonal to the drive train, 
 gearing on the worm being meshable with the helical gearing of the component, and  
 an end of the worm cooperating with an external tool to apply a torque to the drive train.  
   
   
   
       9 . The arrangement of  claim 8 , wherein the coupling further includes: 
 a spring to bias the gearing on the worm to be disengaged from the helical gearing on the component.    
   
   
       10 . The arrangement of  claim 8 , wherein the worm includes a non-geared shaft adjacent the worm gearing to limit a magnitude of torque that can be applied to the drive train.  
   
   
       11 . The arrangement of  claim 10 , wherein: 
 the drive train includes 
 a motor having an armature shaft, and  
 a pinion connected to the armature shaft; and  
   the component is the pinion.    
   
   
       12 . The arrangement of  claim 9 , wherein the pinion is connected to one of a side of the motor adjacent to or opposite of a transmission.  
   
   
       13 . The arrangement of  claim 8 , wherein: 
 the drive train includes a transmission having gears; and    the component is one of the gears in the transmission.    
   
   
       14 . The arrangement of  claim 8 , wherein the component is one of the gears in the PTO actuated chuck.  
   
   
       15 . The arrangement of  claim 4 , further comprising: 
 a gasket to make a seal where between the coupling and the housing proximal to where the coupling is accessible though the housing.    
   
   
       16 . The arrangement of  claim 4 , wherein the coupling is arranged to be manually actuatable to apply a torque upon the drive train only in a direction that loosens jaws of the PTO-actuated chuck.  
   
   
       17 . The arrangement of  claim 4 , wherein the coupling extends proximal to an aperture in the housing.  
   
   
       18 . The arrangement of  claim 4 , wherein the chuck is a power take off (PTO) actuated type of chuck.  
   
   
       19 . A power driver having a drive train, the power driver comprising: 
 a housing; and    a coupling mounted on the housing for rotation about a first axis to selectively apply a torque upon the drive train, the first axis being angled with respect to a rotational second axis of the power driver.    
   
   
       20 . The power driver of clam  19 , wherein the first axis is substantially orthogonal with respect to the second axis.  
   
   
       21 . The power driver of  claim 19 , further comprising: 
 a power take off (PTO) actuated type of chuck.